At all the levels of the spinal cord, nerve cells in the gray substance are multipolar, varying much in their morphology. Many of them are Golgi type I and Golgi type II nerve cells. The axons of Golgi type I are long and pass out of the gray matter into the ventral spinal roots or the fiber tracts of the white matter.
Full Definition of MERCILESS. : having or showing no mercy: pitiless.
What are dolphins? The earliest proto-whale, Pakicetus, was a hoofed mammal related to the ancestors of modern deer, goats and cattle that are referred to as artiodactyls or even-toed ungulates. Pakicetus fossils were discovered in northern Pakistan in 1979 and were dated to about 50 million years ago.